**Passage 2:** Eudiometry is used to find the molecular formula of gaseous hydrocarbons. When of a h — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
**Passage 2:** Eudiometry is used to find the molecular formula of gaseous hydrocarbons. When $10 \text{ mL}$ of a hydrocarbon $C_xH_y$ is burnt in excess oxygen, there is a contraction of $25 \text{ mL}$ in volume. On treatment with $KOH$, the volume reduces by another $20 \text{ mL}$. What is the value of $x$?
Answer: B
💡 Solution & Explanation
Contraction with $KOH$ is due to $CO_2$ absorption. <br>$\text{Volume of } CO_2 = 20 \text{ mL}$. <br>From $C_xH_y \rightarrow xCO_2$: $10x = 20 \Rightarrow x = 2$.
💬Ask on WhatsApp →
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes